A method and apparatus for preventing dark current in a battery management system (BMS) are provided. A battery control apparatus may include a voltage regulator configured to regulate a voltage of a driving power supplied from a power supply to a processor, a first switch, located between the power supply and the voltage regulator, configured to switch on and off a connection between the power supply and the voltage regulator, and a second switch configured to control the first switch based on an input of a driving signal to operate the processor.